Australia forward Ben McCalman admits the players have no clue who will be trimmed from the 40-man squad on Friday.
Michael Cheika will cut ten of his players at the end of the week as the Wallabies focus on the Rugby Championship.
Toulon duo Matt Giteau and Drew Mitchell have both been heavily involved in training but the bigger picture remains a bit of a mystery as Australia prepare to face South Africa.
“It’s very unclear what the final make-up will be,” McCalman told AAP.
“I’m sure Cheik and the coaches have some ideas but it’s just (about) competing hard at the moment.
“They’re certainly giving nothing away but I guess the positive is there’s a lot of depth in Australian rugby at the moment in certain positions.”
Rob Horne added that the competition out on the wing was a good thing, with several candidates trying to make the final group.
“It’s hugely contested, like every position. But what better way do you want? We’ve got guys that are all Test quality and someone’s going to miss out," said Horne.
“We’re going to make each other better and that’s the way it is.
"We’re going to need everyone. Rugby’s a sport where it’s opportunity-based and guys fall over and that’s just the nature of it.”